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Texas Instruments LM61480Q4RPHRQ1
- Part No.:
- LM61480Q4RPHRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerVFQFN
- Datasheet:
-
LM61480Q4RPHRQ1.pdf
- Description:
- IC REG BUCK 4V 8A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,821
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Product details
Overview
LM61480Q4RPHRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) automotive synchronous buck converter delivering up to 8 A output current, operating from 3 V to 36 V input, with fixed 4.0 V output and pin-selectable 400 kHz or 2.2 MHz switching frequency. It integrates high-side/low-side MOSFETs (RDS(on) = 21 mΩ / 13 mΩ), internal compensation, soft-start, thermal shutdown, and a filtered open-drain RESET output - deployed in ADAS power rails and instrument clusters.
For engineers reviewing the LM61480Q4RPHRQ1 datasheet, LM61480Q4RPHRQ1 pinout, LM61480Q4RPHRQ1 application, or LM61480Q4RPHRQ1 equivalent, this page delivers verified package mapping (16-pin VQFN-HR, 4.5 mm × 3.5 mm), confirmed EMI features (CISPR 25 Class 5 compliant, pin-configurable spread spectrum, adjustable SW rise time), functional safety documentation support, and validated alternatives for automotive power design.
Technical Context
The LM61480Q4RPHRQ1 implements a current-mode controlled synchronous buck architecture with integrated dual MOSFETs and adaptive gate drive. Its RT pin sets switching frequency from 200 kHz to 2.2 MHz, while SYNC/MODE enables auto (PFM/PWM), forced PWM, or external synchronization - critical for noise-sensitive automotive domains.
It features dual random spread spectrum (DRSS) with ±4% modulation depth, programmable SW node slew rate via RBOOT, and low-EMI symmetrical pinout. The RESET output provides delayed release with 94–96.5% UV and 110–114% OV thresholds referenced to FB, ensuring robust system power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8 A continuous - supports high-power infotainment SoCs and radar processors without external current boosting. |
| Input Voltage Range | 3 V to 36 V - sustains operation during cold-crank (≥3.7 V startup) and load-dump transients (42 V/100 ms). |
| Fixed Output Voltage | 4.0 V ±1.0% - factory-trimmed reference enables precise biasing of automotive sensors and interface ICs. |
| Switching Frequency | Pin-selectable 400 kHz or 2.2 MHz - allows layout optimization: low-frequency for efficiency, high-frequency for compact magnetics. |
| Quiescent Current | 5 µA in auto mode - extends battery life in always-on vehicle modules during sleep states. |
| Thermal Resistance | RθJA = 21.6 °C/W on EVM - enables 8 A operation at +85°C ambient with standard 2-layer PCB and minimal copper area. |
| EMI Compliance | CISPR 25 Class 5 certified - eliminates need for external shielding or ferrite beads in front-end power stages. |
Pinout & Package
LM61480Q4RPHRQ1 uses a 4.5 mm × 3.5 mm wettable-flank VQFN-HR (RPH) package with 16 terminals, optimized for dual-side cooling and optical solder-joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Primary and secondary input power inputs | Dual high-current paths reduce trace inductance and improve transient response; must be low-impedance coupled to PGND1/PGND2. |
| PGND1, PGND2 | Power ground return for low-side FET | Separate ground pins minimize ground bounce; require direct low-inductance connection to input capacitors and system GND plane. |
| SW | Switch node | Connects to output inductor; voltage swings from near-GND to VIN; routing must minimize loop area to suppress EMI. |
| FB | Feedback input | Directly senses 4.0 V output (fixed version); no external divider needed - simplifies layout and improves regulation accuracy. |
| EN | Enable control | Logic-compatible input with 1.26 V threshold and 0.5 V hysteresis - supports precision UVLO or microcontroller-controlled power sequencing. |
| RESET | Open-drain power-good indicator | Asserts low when output is invalid; includes 1.2–3.75 ms deglitch and delayed release - ensures reliable MCU reset timing. |
| RT | Frequency setting | Ground = 2.2 MHz, connect to VCC = 400 kHz, resistor = adjustable 200–2200 kHz - enables dynamic frequency tuning for EMI mitigation. |
| SPSP | Spread spectrum enable | Ground = enabled with tone correction, VCC = disabled - reduces peak radiated emissions by spreading energy across frequency band. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-configurable spread spectrum | Reduces peak EMI by >10 dB through ±4% DRSS modulation - meets CISPR 25 Class 5 without shielded inductors. |
| Adjustable SW node rise time | RBOOT-controlled slew rate minimizes high-frequency ringing and dv/dt-induced noise in sensitive analog domains. |
| Low-EMI symmetrical pinout | Input/ground/power path symmetry cuts common-mode currents - lowers conducted emissions on DC input lines. |
| Auto PFM/PWM light-load mode | Maintains 5 µA quiescent current below 1 mA load while preserving output regulation - ideal for always-on automotive ECUs. |
| Wettable-flank QFN package | Enables automated optical inspection (AOI) of solder joints - critical for zero-defect automotive manufacturing compliance. |
Applications
| Automotive Infotainment | Instrument Cluster |
|---|---|
|
Use Scenario: Powering SoC, display driver, and audio codec in head-unit systems requiring stable 4.0 V rail under wide input transients. IC Role / Device Role / Timing Role: Primary buck regulator supplying core logic voltage; handles cold-crank dips and load-dump surges autonomously. Use Value: Built-in 42 V transient tolerance and 3.7 V startup enable uninterrupted operation during engine start-stop cycles. |
Use Scenario: Generating 4.0 V supply for TFT-LCD backlight controller and CAN transceiver in digital dashboards. IC Role / Device Role / Timing Role: High-density point-of-load regulator with RESET signal used for display initialization sequencing. Use Value: 4.5 mm × 3.5 mm footprint and integrated compensation reduce BOM count by eliminating external compensation network. |
| ADAS Camera Module | Telematics Control Unit (TCU) |
|
Use Scenario: Delivering clean 4.0 V power to image sensor and ISP in surround-view camera ECU with strict EMI limits. IC Role / Device Role / Timing Role: Low-EMI buck converter operating at 2.2 MHz to avoid AM band interference; RESET confirms valid power before sensor activation. Use Value: Pin-selectable spread spectrum and adjustable SW rise time meet CISPR 25 Class 5 without added filtering components. |
Use Scenario: Supplying 4.0 V to LTE modem, GNSS receiver, and secure element in cellular-connected vehicle gateway. IC Role / Device Role / Timing Role: Always-on power stage with 5 µA auto-mode quiescent current - preserves battery during extended parking modes. Use Value: AEC-Q100 Grade 1 qualification and –40°C to +125°C junction rating ensure reliability across global vehicle operating environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61495Q4RPHRQ1 | 10 A rated, identical pinout and package; higher current capability with increased RDS(on) (HS: 24 mΩ, LS: 15 mΩ) | Suitable where future-proofing for higher load or parallel operation is required; same PCB layout but higher thermal margin at 8 A | Select when headroom beyond 8 A is needed or when sharing layout with 10 A variants across platform designs |
| LM62460Q4RPHRQ1 | 6 A rated, identical pinout and package; lower RDS(on) (HS: 27 mΩ, LS: 17 mΩ) and reduced thermal performance | Optimized for cost-sensitive, lower-power modules (e.g., body control units) where 6 A suffices and EMI requirements are less stringent | Choose for non-safety-critical subsystems with <6 A loads and tighter BOM cost targets |
Compared with LM61495Q4RPHRQ1 and LM62460Q4RPHRQ1, the LM61480Q4RPHRQ1 delivers optimal balance of 8 A capability, thermal efficiency (21.6 °C/W), and EMI performance - making it the preferred choice for mid-tier ADAS and cluster applications where power density and regulatory compliance are jointly critical.
Availability
LM61480Q4RPHRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, and ADAS camera module designs requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM61480Q4RPHRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with deep expertise in automotive-grade power management ICs.
The LM6x4xx-Q1 family was engineered specifically for high-density, low-EMI automotive DC/DC conversion - targeting infotainment, ADAS, and digital cockpit systems where space, noise, and reliability are non-negotiable.
FAQ
What is the maximum input voltage transient rating for LM61480Q4RPHRQ1?
The LM61480Q4RPHRQ1 supports 42 V transients at the VIN pins for durations ≤100 ms and duty cycle ≤0.01%. This enables robust operation during automotive load-dump events without external clamping circuitry. Continuous operation is rated to 36 V. The device maintains regulation down to 3.7 V for startup and 3.0 V thereafter - critical for cold-crank resilience. All specifications are validated per AEC-Q100 Grade 1 requirements.
Does LM61480Q4RPHRQ1 require external compensation components?
No, LM61480Q4RPHRQ1 integrates full Type II compensation, eliminating the need for external resistors or capacitors in the feedback loop. This reduces BOM count, saves PCB area, and improves production yield. The fixed 4.0 V output version uses internal feedback, so the FB pin connects directly to the output without external dividers. Compensation stability is guaranteed across temperature and load conditions per TI's characterization data.
How does the RESET output function on LM61480Q4RPHRQ1?
The LM61480Q4RPHRQ1 provides an open-drain RESET output with built-in filtering and delayed release. It asserts low when FB falls below 94–96.5% of target (UV threshold) or rises above 110–114% (OV threshold), with 10–45 µs deglitching and 1.2–3.75 ms active delay. RESET remains low during EN = low or thermal shutdown. This eliminates need for discrete reset supervisors in automotive systems, simplifying power sequencing for MCUs and FPGAs.
Can LM61480Q4RPHRQ1 operate in forced PWM mode?
Yes, LM61480Q4RPHRQ1 supports forced PWM (FPWM) mode via the SYNC/MODE pin: pull high to enable constant-frequency operation regardless of load. This prevents audible noise and ensures predictable EMI behavior in noise-sensitive applications like camera modules or audio subsystems. Auto mode (default) transitions between PFM and PWM to optimize light-load efficiency, drawing only 5 µA at no load.
Is LM61480Q4RPHRQ1 pin-compatible with other devices in the LM6x4xx-Q1 family?
Yes, LM61480Q4RPHRQ1 is pin-to-pin compatible with LM61495Q4RPHRQ1 (10 A) and LM62460Q4RPHRQ1 (6 A) in the same RPH package. This enables scalable power design across vehicle platforms - e.g., using identical PCB layout for 6 A, 8 A, or 10 A variants - reducing development time and qualification effort. Thermal pad layout and decoupling requirements remain consistent across the family.
LM61480Q4RPHRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 4V
- Voltage - Output (Max):
- -
- Current - Output:
- 8A
- Frequency - Switching:
- 400kHz, 2.2MHz, 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-VQFN-HR (4.5x3.5)
LM61480Q4RPHRQ1 FAQ
1.How can I place an order for LM61480Q4RPHRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61480Q4RPHRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM61480Q4RPHRQ1 reliable?
The price and inventory of LM61480Q4RPHRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61480Q4RPHRQ1 is usually 5 days.
3.What payment methods are accepted for LM61480Q4RPHRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61480Q4RPHRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61480Q4RPHRQ1?
LM61480Q4RPHRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61480Q4RPHRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM61480Q4RPHRQ1?
For technical support, including LM61480Q4RPHRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61480Q4RPHRQ1 requirements.
6.How does Aetrix verify that LM61480Q4RPHRQ1 is sourced from the original manufacturer or authorized distributors?
All LM61480Q4RPHRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM61480Q4RPHRQ1 meets industry standards.
7.What is the process for return or replacement of LM61480Q4RPHRQ1?
All LM61480Q4RPHRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM61480Q4RPHRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM61480Q4RPHRQ1 part is unused and in its original packaging.
Return procedure for LM61480Q4RPHRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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